Add oil to the pot (about two circles) and sauté potatoes sliced to medium thickness.
When the potatoes start to soften, add half a spoonful of salted shrimp (focus on the solids) and continue to sauté.
Pour in 450ml of water, 1 spoon of soy sauce for soup, 1 spoon of anchovy fish sauce, and half a spoonful of minced garlic. Bring to a boil over medium heat.
Once the potatoes are cooked, pour the beaten eggs around the edge of the soup.
Without stirring the eggs, finish with a sprinkle of black pepper and chopped green onions.